This example visualizes the Iris dataset as an animated scatterplot where users can select which columns to plot on the x- and y-axes via dropdown menus. Built with React and D3 v6, it uses `d3.csv` for data loading, `scaleLinear` and `scalePoint` for axes, and SVG circles rendered through a reusable `scatterPlot` component. Transitions animate point positions over 1000ms with staggered delays, while `d3.dispatch` handles menu change events to update the visualization dynamically.